This article describes and evaluates a procedure for imputing missing values for a relatively complex data structure when the data are missing at random. The imputations are obtained by fitting aâ€¦ (More)

A number of techniques for probability sampling without replacement (SWOR) have been suggested, although it is not clear which method is consistently superior in terms of statistical efficiency. Raoâ€¦ (More)

When considering sample stratification by several variables, we often face the case where the expected number of sample units to be selected in each stratum is very small and the total number ofâ€¦ (More)